Home / 11,816.21-17,731.31-7,145.75

Finding the Fourth Proportional to 11,816.21, 17,731.31 and 7,145.75

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Solution

The fourth proportional to 11,816.21, 17,731.31 and 7,145.75 is: 10,722.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,816.21 : 17,731.31 = 7,145.75 : x
  2. Step 2: Convert to fraction form
    11,816.21/17,731.31 = 7,145.75/x
  3. Step 3: Cross multiply
    11,816.21x = 17,731.31 × 7,145.75
  4. Step 4: Simplify right side
    11,816.21x = 126,703,517.03
  5. Step 5: Solve for x
    x = 126,703,517.03/11,816.21
  6. Step 6: Final answer
    x = 10,722.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.